I'd like to add one detail to the very thorough translation and interpretation from Fredel Fuhrman  

From the internet
http://alemannia-judaica.de/biebesheim_synagoge.htm#Biebesheim
we can learn that the inauguration of the synagogue of Biebesheim took place on November 22nd 1867.

This gives weight to the assumption that this ornemental curtain for the Holy Ark was prepared for the new synagogue built in 1867.

The inauguration itself took place in the Hebrew year of 5628, but we can assume that the parokhet was ready and maybe in place before the beginning of 5628 = September 30th 1867.

Best regards 
Laurent Kassel 
Moreshet   Israel